function StrLenFormat(cellvalue) {
	var oldstrlen = cellvalue.length;
	var newstr = "";
	if (oldstrlen > 5) {
		newstr = cellvalue.substring(0, 5) + "...";
	} else {
		newstr = cellvalue;
	}
	return newstr;
}
function down(cellvalue) {
	var url = "<a href='" + cellvalue
			+ "'><input  type='button'>下载</button></a>";
	return url;
}